Ophthalmic mounting



May 18, 1937. GA. ELLESTAD I 7 2125 080349 OPHTHALMIC MOUNTING Filed March 2'7, 1935 1m INVENTOR v BY ' ATTORNEY Patented May 18, 1937 UNITED STATES QPHTHALIVHC MOUNTING Gerhard A. Ellestad, Rochester, N. Y., assignor to Bausch & Lomb Optical Company, Rochester, N. Y., a corporation of New York Application March 27, 1935, Serial No. 13,308

9 Claims.

The present invention relates to ophthalmic mountings and more particularly to mountings which are attached to lenses to provide rimless spectacles.

One of the objects of the present invention is to provide an improved ophthalmic mounting. Another object is to provide an improved rimless mounting which can be quickly and permanently attached to a lens without the use of screws. A further object is to provide a rimless mounting in which the two straps are separate and independent. A further object is to provide an ophthalmic mounting having independent straps in which the straps are anchored together at both ends by a unitary retaining element. These and other objects and advantages reside in certain novel features of construction, arrangement and combination of parts as will hereinafter be more fully set forth and pointed out in the appended claims.

Referring to the drawing:

Fig. 1 is a fragmentary view of a rimless mounting embodying my invention.

Fig. 2 is a horizontal sectional View of same.

Fig. 3 is a rear view of the front strap of the mounting.

One embodiment of my invention is illustrated in the drawing wherein ll indicates a bridge secured to a lens l2 by a mounting indicated generally at l3. The bridge H is fixed to the shoe M which carries the front strap !5 and the strap I5 is provided with a projection it having reentrant grooves ll, which projection extends into an opening l8 adjacent the edge of the lens l2. A groove I9 is formed in the strap l5 and extends from the projection l3 toward the edge of the lens. The rear face of the shoe I4 is formed with a recess 20 having an internal depression 2|.

The rear strap 22 of the mounting I3 is separate from the front strap I5 and has a tapered aperture 23 in alignment with the opening l3. The other end of the rear strap 22 has a projection 24 formed with a reentrant neck portion 25. This projection 24 is adapted to extend into the recess 20 of the shoe l4 and a groove 26 is formed in the strap 22 between the aperture 23 and a point adjacent the projection 24.

In assembling my improved mounting the front strap I5 is placed on one surface of the lens H so that the projection It extends into the lens opening l8 and the shoe l4 abuts the edge of the lens l2. The rear strap 22 is then placed on the other surface of the lens with the projection 24 extending into the recess Ell and U;

through the aperture 23. Heat is applied so that the substance 21' is rendered fluid or plastic and it is then forced into the opening IS, the grooves l3 and 23 and the recess 23, where it is allowed to harden, thus securing the mounting to the lens. The projections l6 and 24 with their reentrant grooves IT and 25, respectively, the tapered aperture 23 and the recess 20 with its depression 2| serve as anchoring means to securethe'straps in the substance 21 and thus anchor the straps to the lens. The fusible substance 2'! may be a low meltingpoint metallic alloy. or a non-metallic composition such as the pyroxylin substance sold under the trade name of Lumarith for example. By making the mounting of two pieces, it is possible to accommodate lenses of different thickness and the fusible substance 21 extending along the grooves l9 and 26 serves to hold the lens tightly whether the straps l5 and 22 be flat against the surfaces of the lens or not.

From the foregoing it will be apparent that I am able to attain the objects of my invention and provide a new and improved ophthalmic mounting capable of being readily and rapidly secured to lenses of different thicknesses without the use of screws. Various modifications can, of course, be made without departing from the spirit of my invention or the scope of the appended claims.

I claim:

1. An ophthalmic mounting comprising two structurally independent straps positioned, respectively, on opposite surfaces of a lens having an opening adjacent one edge, anchoring means on each strap adjacent said opening, further anchoring means on each strap beyond the edge of said lens, and a fusible retaining element secured to all of said anchoring means.

2. An ophthalmic mounting comprising two structurally independent straps positioned, respectively, on opposite surfaces of a lens having an opening adjacent one edge, anchoring means on each strap adjacent said opening, further anchoring means on each strap beyoiid the edge of said lens, and a fusible retaining element secured to all'of said anchoring means, said retaining element substantially filling said opening.

3. An ophthalmic mounting comprising two independent straps positioned, respectively, on opposite sides of a lens having an opening adjacent.

one edge, anchoring means on one strap extending into said opening, an aperture in the other strap substantially in alignment with said opening, cooperating anchoring means on said straps beyond the edge of said lens, a groove in each strap extending from said opening toward the edge of said lens and a retaining element extending through said aperture into said opening and along said grooves and into engagement with each anchoring means.

4. An ophthalmic mounting comprising two independent straps positioned, respectively, on opposite sides of a lens having an opening adjacent one edge, anchoring means on one strap extending into said opening, a tapered aperture on the other strap substantially in alignment with said opening, cooperating anchoring means on said straps beyond the edge of said lens and a retaining element extending through said aperture into said opening and into engagement with each anchoring means.

5. An ophthalmic mounting comprising two independent straps positioned, respectively, on opposite sides of a lens having an opening, a projection adjacent one end of one strap extending into said opening, a recess adjacent the other end of said strap, a projection adjacent one end of said second strap extending into said recess, an aperture in said second strap opposite said opening and a retaining element extending through said aperture into said opening and said recess and surrounding said projections.

6. An ophthalmic mounting comprising tWo structurally independent straps positioned, respectively, on opposite sides of a lens having an opening, a projection on one of said straps extending into said opening, a reentrant anchoring groove on said projection, a tapered aperture on the other strap and fusible retaining means extending through said aperture into said opening and engaging said groove and projection and the wall of said opening.

7. An ophthalmic mounting comprising two spaced straps positioned, respectively, on opposite faces of a lens having an opening, anchoring means on one of said straps extending into said opening, the other strap having an aperture and a fusible retaining element positioned in said aperture and opening and anchored to said anchoring means, said element being in engagement with the walls of the opening and aperture.

8; An ophthalmic mounting comprising a strap positioned in contact with the surface of a lens having an opening, anchoring means on said strap extending into said opening and a fusible retaining element positioned in said opening, said element being in contact With the wall of said opening and secured to said anchoring means, said element extending over the other surface of said lens.

9. An ophthalmic mounting comprising two structurally independent straps positioned, respectively, on opposite surfaces of a lens having an opening adjacent its edge, means for securing said straps to each other and to the lens, ,said means comprising anchoring means on each of said straps adjacent to said opening and further anchoring means on each of said straps adjacent to the edge of the lens, and a fusible retaining means filling said opening and secured to all of said anchoring means.

GERHARD A. ELLESTAD. 

